The meaning of the Acronym OSA is...

OSA is

• Office of the Secretary of the Army
• Operational Support Airlift
• Open System Architecture
• Office Of Special Affairs
• Operational Services Agreement

More Meanings For OSA:

• Office Systems Architecture
• Open System Architecture
• Open Scripting Architecture
• Open Standard Architecture
• Open Service Access
• Omnibus Service Authority
• Office Of Student Activities
• Observability Subspace Algorithm
• Order Of St Augustine
• Orissa Society Of America
• One Step Ahead
• Ontario Society Of Artists
• Orissa Society Of Americas
• The Office Of Secret Actions
• Old School Arcade

OSA is also in:

• General
• Networking
• Unfiled
• Universities